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Argiope aurantia
Spider with a white sack, maybe a wrapped prey.
Semi desert.
The wrapped sack is prey. These spiders make a purse like sack away from the web for their eggs. There is lots of variation. One of the most interesting features is the stabilimentum (reinforced area) in web. They makes a vertical zigzag band above and below the middle of the web. Juveniles make a circular stabilimentum in the center of the web.